Dredges were brought in to mine gold-bearing deposits in the Fairbanks mining district after 1920. This bucket-line or ladder dredge has 68 buckets, each with a capacity of 6 cubit feet. The bucket line was driven by a 150 horsepower motor that . . . — — Map (db m144242) HM
Dr. Maple was a structural engineer and principal designer of the trans-Alaska pipeline. He holds three patents for his development of innovative pipe supports that enabled the warm oil pipeline to safely traverse areas of permafrost. He pioneered . . . — — Map (db m58949) HM
• Length: 800 miles
• Diameter: 48 inches
• Crosses three mountain ranges and more than 500 rivers and streams
• Cost to build: $8 billion in 1977, the largest privately funded construction project at that time
• Construction began March . . . — — Map (db m175383) HM
On November 16, 1973, through Presidential approval of pipeline legislation, Alyeska Pipeline Service Company received permission to begin construction of the 800-mile trans Alaska pipeline, its pump stations and the Marine Terminal at Valdez. . . . — — Map (db m20215) HM
